diff --git a/libavcodec/gifdec.c b/libavcodec/gifdec.c index 136d1127d237241a9d9df4a9496f72855b2e1da3..b1207ae19d115af343f05c23bde1cd4238436235 100644 --- a/libavcodec/gifdec.c +++ b/libavcodec/gifdec.c @@ -87,8 +87,11 @@ static int gif_read_image(GifState *s, AVFrame *frame) /* verify that all the image is inside the screen dimensions */ if (left + width > s->screen_width || - top + height > s->screen_height) - return AVERROR(EINVAL); + top + height > s->screen_height || + !width || !height) { + av_log(s->avctx, AV_LOG_ERROR, "Invalid image dimensions.\n"); + return AVERROR_INVALIDDATA; + } /* build the palette */ n = (1 << bits_per_pixel);